CN102886541A

CN102886541A - Clamping device

Info

Publication number: CN102886541A
Application number: CN2011102072918A
Authority: CN
Inventors: 李理
Original assignee: KUNSHAN YICHENG TOOL CO Ltd
Current assignee: Meishiman Tools Hai'an Co ltd
Priority date: 2011-07-22
Filing date: 2011-07-22
Publication date: 2013-01-23
Anticipated expiration: 2031-07-22
Also published as: CN102886541B

Abstract

The invention discloses a clamping device. A hexagonal groove and a circular groove are arranged inside a mandrel sequentially and axially; a radial rectangular hole is arranged on the sidewall of the hexagonal groove in a penetration manner; a ball is positioned in the rectangular hole of the mandrel; the ball is exposed locally outside the hexagonal groove and cannot fall off; a follower is inserted into the circular groove of the mandrel; one end of the follower is capable of extending into the hexagonal groove elastically and locally; an outer jacket is sleeved outside the mandrel and can do an elastic reciprocal motion relative to the mandrel; an inner jacket is located between the outer jacket and the mandrel; and the inner jacket is capable of elastically propping against the ball and is moved in a length direction of the rectangular hole. According to the clamping device, a work piece can be replaced quickly; when the work piece is inserted into the hexagonal groove of the mandrel, the inner jacket pushes the ball to clamp the groove on a tail part of the work piece automatically without the need to pull out the outer jacket manually, thereby finishing the connection between the mandrel and the work piece easily and reducing the use times of the outer jacket; and when the work piece is replaced, the work piece is pushed out forcibly by a spring and simultaneously does not fall off under the action of the magnetic attraction of the follower, thereby reducing the pickup frequency after the work piece falls off.

Description

Clamping apparatus

Technical field

The present invention relates to the technical field of chuck, refer to especially a kind of clamping apparatus that is applicable to the hexagon workpiece.

Background technology

In the U.S. the 4th, 900, No. 202 and the 5th, 013, wait for No. 194 and disclose a kind of chuck in the Patent Case, in order to fast clamp, replace the hexagon workpiece, being configured to of this chuck: flexible overcoat 40 in mandrel 10 outer race, allow overcoat 40 relative mandrels 10 do the reciprocating type displacement motion, one end axial depression of mandrel 10 has holding tank 72, can put into hexagonal workpiece 60 in the groove, and the position of arcuate furrow 61 is provided with one or above ball-and-socket 73 on the relative workpiece 60 of cell wall of holding tank 72, each ball-and-socket 73 is through to holding tank 72 side wall surfaces from mandrel 10 outer circumference surfaces, and each ball-and-socket holds single spheroid 20, and holding tank 72 side wall surfaces are exposed in spheroid 20 parts, and can fall into groove 61 the insides of workpiece 60, when overcoat 40 elastic recovery original positions, its inside circumference face is provided with the outstanding ring rib 44 in relative ball-and-socket 73 positions, and its restriction spheroid 20 blocks the holding tank 72 that workpiece 60 must not leave arbitrarily mandrel 10.

But overcoat 40 causes workpiece 60 relative mandrels 10 to be done and inserts or detach when moving take the ejection state as normality, must back out overcoat 40 by manpower, and whole operating process is quite loaded down with trivial details, and is very inconvenient in the use.When especially detaching workpiece, spheroid 20 is radially outwards pushed open by workpiece 60 along groove 61 gradients of workpiece, can increase the burden that detaches of workpiece, in order to alleviate the burden that detaches, the U.S. the 6th, 325, No. 393 Patent Case discloses another chuck scheme, and overall structure is similar to aforementioned chuck, and arranges to have sliding sleeve (Follower) in the holding tank depths of mandrel, this sliding sleeve possesses flexible kinetic energy, can promote voluntarily the workpiece bullet to the opening of holding tank when workpiece detaches.Because chuck does not have resistance when the structure of workpiece, so workpiece can be ejected the mandrel outside and drop on the ground, picks up again, uses inconvenience.

Summary of the invention

In order to overcome defects, the invention provides a kind of clamping apparatus, when using, this clamping apparatus need not back out overcoat, and free of a burden when workpiece withdraws from, also be difficult for dropping the end of on, easy to use.

The technical scheme that the present invention adopts in order to solve its technical problem: a kind of clamping apparatus, comprise mandrel, spheroid, sliding sleeve, jacket and inner sleeve, mandrel one end to other end inboard is provided with axial hex slot and a circular groove successively, run through on the hex slot interlude of this mandrel and be provided with radially an elongated hole, spheroid places in the elongated hole of mandrel, the spheroid part is exposed the hex slot periphery and is not dropped, sliding sleeve is plugged in the circular groove of mandrel, one end flexibly part extend in the hex slot, overcoat is enclosed within the mandrel periphery, overcoat relatively mandrel is done flexible reciprocating, inner sleeve is between overcoat and mandrel, and inner sleeve can elasticity props up spheroid and moves along the length direction of elongated hole.

As a further improvement on the present invention, wherein can be the flexibly local structure that extend in the hex slot of sliding sleeve one end is: have an axial through hole on the sliding sleeve, the end that this through hole leads to the hex slot of mandrel is sealed by a magnet assembly, be provided with a brute spring in the through hole of sliding sleeve, brute spring one end withstands magnet assembly, the other end props up the circular groove bottom surface, be embedded with the interior jump ring of a circle convex on the mandrel circular groove madial wall, the sliding sleeve lateral wall is an end diameter less than the T shape structure of other end diameter, form circle annular stepped face radially on the sliding sleeve lateral wall, the axial other end of interior jump ring backstop is in the annular stepped face of sliding sleeve.

As a further improvement on the present invention, wherein inner sleeve can elasticity props up spheroid and along the structure that the length direction of elongated hole moves is: the inboard other end of overcoat fixedly is inlaid with a rear cover, rear cover one end face presses closer a Compress Spring, Compress Spring one end presses closer inner sleeve, and inner sleeve one end inboard props up spheroid other end outer circumference surface.

As a further improvement on the present invention, inner sleeve one end inboard is an end internal diameter greater than the spherical of other end internal diameter.

As a further improvement on the present invention, wherein this overcoat inboard is provided with a ring rib, and this ring rib protrudes and is positioned at circumferential surface to the position of mandrel elongated hole, and this ring rib backstop is in spheroid one end outer circumference surface, the ring rib except block the inner sleeve bullet from, can also stop spheroid to leave elongated hole.

As a further improvement on the present invention, the mandrel periphery also is provided with an annular gasket, and this pad backstop axially clips a spring in mandrel periphery one end between ring rib and this annular gasket.

As a further improvement on the present invention, pad backstop in the structure of mandrel periphery one end is: mandrel one end periphery is embedded with an outer jump ring, and this outer jump ring other end wall backstop is in the axial end of annular gasket.

As a further improvement on the present invention, the hex slot periphery is exposed in the spheroid part and the structure that do not drop is: the elongated hole madial wall is spherical in shape on the mandrel, also spherical in shape of inner sleeve one end inboard, spheroid just is positioned at the space that the spherical of elongated hole and inner sleeve forms, this space along the opening diameter of mandrel radial outside less than sphere diameter.

The invention has the beneficial effects as follows: every afterbody is formed with the workpiece of one groove, when inserting the hex slot of mandrel, does not need manually to pull out overcoat, just can allow inner sleeve promote voluntarily the groove that spheroid blocks the workpiece afterbody, finishes easily the connecting moves of mandrel and workpiece.Because spheroid is subject to pushing of inner sleeve elastic force, can automatically walk along the elongated hole medial surface, need not back out overcoat when therefore inserting workpiece, just can finish the action that workpiece inserts clamping apparatus, rationally reduce the access times of overcoat.Clamping apparatus is when changing workpiece, must pull out first overcoat, making workpiece release power by brute spring moves outside clamping device, and it can not drop under the magnetic effect of sliding sleeve, spheroid breaks away from the groove of workpiece and oppositely pushes inner sleeve open, can take easily and the required workpiece of fast replacing this moment, because workpiece is subject to the attraction of magnet assembly and is subjected to the active force of the anti-body of pushing the ball of workpiece, these two power summations are got up just to have offset workpiece and are subjected to the brute spring thrust of bullet outward, reduce the number of times that drops and pick up, more save time during use.

Description of drawings

Fig. 1 is decomposing state schematic diagram of the present invention;

Fig. 2 is sectional axonometric drawing of the present invention;

Fig. 3 is that the first workpiece of the present invention inserts view;

Fig. 4 is that second workpiece of the present invention inserts view;

Fig. 5 is that the 3rd workpiece of the present invention inserts view;

Fig. 6 is that workpiece of the present invention takes out view;

Fig. 7 is the present invention and screwdriver head connection status schematic diagram;

Fig. 8 existing structure principle schematic.

Below accompanying drawing is explained

60---workpiece 61---groove 72---holding tank

73---ball-and-socket 10---mandrel 11---cylindrical section

12---hex slot 13---circular groove 14---elongated hole

Jump ring in the 20---spheroid 30---sliding sleeve 31---

32---brute spring 33---through hole 34---magnet assembly

The outer jump ring 42---pad of 40---overcoat 41---

43---spring 44---ring rib 50---inner sleeve

Cover 62---screwdriver head behind the 51---Compress Spring 52---

The specific embodiment

Embodiment: a kind of clamping apparatus, comprise mandrel 10, spheroid 20, sliding sleeve 30, overcoat 40 and inner sleeve 50, mandrel 10 external forms possess given shape, be applicable to the drive end of pneumatic (electronic or manual) instrument, and go out to form the cylindrical section 11 that a diameter inside contracts at mandrel 10 1 distal process vertically, these cylindrical section 11 inboards are provided with hex slot 12, hex slot bottom and a circular groove 13 coaxial communication, be provided with the flexible sliding sleeve 30 of tool in the circular groove 13, circular groove 13 medial surfaces are embedded an interior jump ring 31, should in jump ring 31 backstops in sliding sleeve 30 outside end faces so that sliding sleeve not bullet but can enter in the hex slot 12 part from mandrel 10, laterally run through on these hex slot 12 sidewalls and be provided with radially an elongated hole 14, spheroid 20 places in the elongated hole 14 of mandrel, mandrel 10 periphery are arranged with overcoat 40, overcoat 40 backstops deviate from the outside of mandrel in spheroid, restriction spheroid 20 must not break away from elongated hole 14, this elongated hole 14 is positioned at the A/F at hex slot 12 inner surface places less than spheroid 20 diameters, therefore exposing hex slot 12 medial surfaces, spheroid 20 parts but can not drop, and elongated hole 14 is positioned at the A/F of mandrel 10 lateral surfaces greater than spheroid 20 diameters, causes the spheroid 20 can be along the length direction roll displacement of elongated hole;

Sliding sleeve 30 is hollow tube, inner along the unobstructed through hole 33 in pipe range direction formation front and back, the openend that this through hole 33 leads to mandrel 10 hex slot 12 is installed with columned magnet assembly 34, through hole 33 other ends be enclosed within brute spring 32 outsides, brute spring 32 1 ends withstand magnet assembly 34, thereby the other end props up circular groove 13 bottom surfaces and produces elastic force, make sliding sleeve 30 have bullet to the kinetic energy of the direction of hex slot 12, sliding sleeve 30 periphery are that an end diameter is less than the step-like periphery of other end diameter, the annular stepped face of two periphery adjoiners props up interior jump ring 31, stops sliding sleeve 30 to eject circular groove 13;

Overcoat 40 is ring body, can be enclosed within cylindrical section 11 periphery of mandrel 10, protrude a ring rib 44 at overcoat 40 in the face of the position of mandrel 10 elongated holes 14, this ring rib 44 is over against the one side backstop of mandrel 10 in the spheroid lateral wall, can stop spheroid 20 to leave elongated hole 14, be arranged with the pad 42 that is the ring plate shape on the outer circumference surface of the cylindrical section 11 of mandrel 10, this pad one end backstop is in outer jump ring 41 other ends of an embedding mandrel 10 outer circumference surfaces, be folded with spring 43 between pad 42 and the ring rib 44, spring 43 compressions produce elastic force, and then impel overcoat 40 relative mandrels 10 to do reciprocating and overcoat can't break away from mandrel;

Inner sleeve 50 also is ring body; inner sleeve is positioned at overcoat 40 and is subjected to overcoat protection; inner sleeve is sheathed on cylindrical section 11 peripheries of mandrel 10 simultaneously; inner sleeve 50 is axially just between ring rib 44 and rear cover 52; rear cover 52 build-ins are in the medial surface of overcoat 40; the Compress Spring 51 1 ends promotion inner sleeve 50 that is sheathed on the mandrel outside props up spheroid 20 other ends and props up rear cover one end face, and ring rib 44 backstops are used for limiting the displacement of the relative mandrel 10 of inner sleeve in inner sleeve 50 axial ends.

When inserting workpiece, workpiece 60 is bestowed external force, make the hexagonal afterbody of workpiece be inserted into hex slot 12 the insides of mandrel 10, the guide face that workpiece 60 tail ends tilt promotes the local spheroid 20 that exposes elongated hole 14 and moves along the rear cover of elongated hole deflection 52 directions, driving simultaneously inner sleeve 50 moves and leaves original position relative to overlapping afterwards 52, pushing simultaneously Compress Spring 51 makes its distortion produce the required elastic force that resets, along with continuing deeply of workpiece 60, can contact the local magnet assembly 34 that exposes sliding sleeve 30 front ends of hex slot 12, and be pulled together each other, workpiece further drives sliding sleeve 30 extruding brute springs 32 and recedes into simultaneously 13 li of circular grooves, until the groove 61 of workpiece 60 faces elongated hole 14, this moment, spheroid 20 was oppositely promoted by inner sleeve 50 elongated hole 14 is interior, it is got back to ring rib 44 correspondence positions and blocks groove 61, stops workpiece 60 arbitrarily not extract out from clamping apparatus.When extracting workpiece out, under the effect of external force, overcoat 40 is pulled out a segment distance, ring rib 44 is moved relative to pad 42, when extrusion spring 43 makes its distortion produce reseting elasticity, make spheroid 20 no longer be subject to encircling the restriction of rib 44.Because the elastic force after the elastic force of brute spring 32 accumulations stretches greater than Compress Spring 51, therefore promoting workpiece 60, withdraws from toward hex slot 12 opening directions sliding sleeve 30, cover 52 directions moved after gradient by groove 61 forced spheroid 20 again to be partial to simultaneously, oppositely push inner sleeve 50 open, Compress Spring 51 is squeezed, put aside the required elastic force that resets, the part enters hex slot 12 until sliding sleeve 30 is stoped by interior jump ring 31, simultaneously because magnet assembly 34 sorption workpiece 60, workpiece can not be ejected mandrel and drop, the workpiece 60 that can take easily this moment and fast replacing is required.

Claims

1. clamping apparatus, comprise mandrel, spheroid, sliding sleeve, jacket and inner sleeve, mandrel one end to other end inboard is provided with axial hex slot and a circular groove successively, run through on the hex slot interlude of this mandrel and be provided with radially an elongated hole, spheroid places in the elongated hole of mandrel, and the spheroid part is exposed the hex slot periphery and do not dropped; Sliding sleeve is plugged in the circular groove of mandrel, one end flexibly part extend in the hex slot, and overcoat is enclosed within the mandrel periphery, and overcoat relatively mandrel is done flexible reciprocating, inner sleeve is between overcoat and mandrel, and inner sleeve can elasticity props up spheroid and moves along the length direction of elongated hole.

2. clamping apparatus according to claim 1, it is characterized in that: wherein can be the flexibly local structure that extend in the hex slot of sliding sleeve one end is: have an axial through hole on the sliding sleeve, the end that this through hole leads to the hex slot of mandrel is sealed by a magnet assembly, be provided with a brute spring in the through hole of sliding sleeve, brute spring one end withstands magnet assembly, the other end props up the circular groove bottom surface, be embedded with the interior jump ring of a circle convex on the mandrel circular groove madial wall, the sliding sleeve lateral wall is an end diameter less than the T shape structure of other end diameter, form circle annular stepped face radially on the sliding sleeve lateral wall, the axial other end of interior jump ring backstop is in the annular stepped face of sliding sleeve.

3. clamping apparatus according to claim 1, it is characterized in that: wherein inner sleeve can elasticity props up spheroid and along the structure that the length direction of elongated hole moves is: the inboard other end of overcoat fixedly is inlaid with a rear cover, rear cover one end face presses closer a Compress Spring, Compress Spring one end presses closer inner sleeve, and inner sleeve one end inboard props up spheroid other end outer circumference surface.

4. clamping apparatus according to claim 3, it is characterized in that: inner sleeve one end inboard is an end internal diameter greater than the spherical of other end internal diameter.

5. clamping apparatus according to claim 1 is characterized in that: wherein this overcoat inboard is provided with a ring rib, and this ring rib protrudes and is positioned at circumferential surface to the position of mandrel elongated hole, and this encircles rib backstop in spheroid one end outer circumference surface.

6. clamping apparatus according to claim 5, it is characterized in that: the mandrel periphery also is provided with an annular gasket, and this pad backstop axially clips a spring in mandrel periphery one end between ring rib and this annular gasket.

7. clamping apparatus according to claim 1, it is characterized in that: pad backstop in the structure of mandrel periphery one end is: mandrel one end periphery is embedded with an outer jump ring, and this outer jump ring other end wall backstop is in the axial end of annular gasket.

8. clamping apparatus according to claim 1, it is characterized in that: the hex slot periphery is exposed in the spheroid part and the structure that do not drop is: the elongated hole madial wall is spherical in shape on the mandrel, also spherical in shape of inner sleeve one end inboard, spheroid just is positioned at the space that the spherical of elongated hole and inner sleeve forms, this space along the opening diameter of mandrel radial outside less than sphere diameter.